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btrfs-progs: remove useless branch in __merge_refs
[btrfs-progs-unstable/devel.git] / qgroup.c
blob267cd7f11a9c14cc7b0cd66e37e29c6993c0dac2
1 /*
2 * Copyright (C) 2012 STRATO. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
19 #include "qgroup.h"
20 #include <sys/ioctl.h>
21 #include "ctree.h"
22 #include "ioctl.h"
23 #include "utils.h"
24 #include <errno.h>
25
26 #define BTRFS_QGROUP_NFILTERS_INCREASE (2 * BTRFS_QGROUP_FILTER_MAX)
27 #define BTRFS_QGROUP_NCOMPS_INCREASE (2 * BTRFS_QGROUP_COMP_MAX)
28
29 struct qgroup_lookup {
30 struct rb_root root;
31 };
32
33 struct btrfs_qgroup {
34 struct rb_node rb_node;
35 struct rb_node sort_node;
36 /*
37 *all_parent_node is used to
38 *filter a qgroup's all parent
39 */
40 struct rb_node all_parent_node;
41 u64 qgroupid;
42
43 /*
44 * info_item
45 */
46 u64 generation;
47 u64 rfer; /*referenced*/
48 u64 rfer_cmpr; /*referenced compressed*/
49 u64 excl; /*exclusive*/
50 u64 excl_cmpr; /*exclusive compressed*/
51
52 /*
53 *limit_item
54 */
55 u64 flags; /*which limits are set*/
56 u64 max_rfer;
57 u64 max_excl;
58 u64 rsv_rfer;
59 u64 rsv_excl;
60
61 /*qgroups this group is member of*/
62 struct list_head qgroups;
63 /*qgroups that are members of this group*/
64 struct list_head members;
65 };
66
67 /*
68 * glue structure to represent the relations
69 * between qgroups
70 */
71 struct btrfs_qgroup_list {
72 struct list_head next_qgroup;
73 struct list_head next_member;
74 struct btrfs_qgroup *qgroup;
75 struct btrfs_qgroup *member;
76 };
77
78 /*
79 * qgroupid,rfer,excl default to set
80 */
81 static struct {
82 char *name;
83 char *column_name;
84 int need_print;
85 unsigned unit_mode;
86 int max_len;
87 } btrfs_qgroup_columns[] = {
88 {
89 .name = "qgroupid",
90 .column_name = "Qgroupid",
91 .need_print = 1,
92 .unit_mode = 0,
93 .max_len = 8,
94 },
95 {
96 .name = "rfer",
97 .column_name = "Rfer",
98 .need_print = 1,
99 .unit_mode = UNITS_DEFAULT,
100 .max_len = 12,
101 },
102 {
103 .name = "excl",
104 .column_name = "Excl",
105 .need_print = 1,
106 .unit_mode = UNITS_DEFAULT,
107 .max_len = 12,
108 },
109 { .name = "max_rfer",
110 .column_name = "Max_rfer",
111 .need_print = 0,
112 .unit_mode = UNITS_DEFAULT,
113 .max_len = 12,
114 },
115 {
116 .name = "max_excl",
117 .column_name = "Max_excl",
118 .need_print = 0,
119 .unit_mode = UNITS_DEFAULT,
120 .max_len = 12,
121 },
122 {
123 .name = "parent",
124 .column_name = "Parent",
125 .need_print = 0,
126 .unit_mode = 0,
127 .max_len = 7,
128 },
129 {
130 .name = "child",
131 .column_name = "Child",
132 .need_print = 0,
133 .unit_mode = 0,
134 .max_len = 5,
135 },
136 {
137 .name = NULL,
138 .column_name = NULL,
139 .need_print = 0,
140 .unit_mode = 0,
141 },
142 };
143
144 static btrfs_qgroup_filter_func all_filter_funcs[];
145 static btrfs_qgroup_comp_func all_comp_funcs[];
146
147 void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column)
148 {
149 int i;
150
151 ASSERT(0 <= column && column <= BTRFS_QGROUP_ALL);
152
153 if (column < BTRFS_QGROUP_ALL) {
154 btrfs_qgroup_columns[column].need_print = 1;
155 return;
156 }
157 for (i = 0; i < BTRFS_QGROUP_ALL; i++)
158 btrfs_qgroup_columns[i].need_print = 1;
159 }
160
161 void btrfs_qgroup_setup_units(unsigned unit_mode)
162 {
163 btrfs_qgroup_columns[BTRFS_QGROUP_RFER].unit_mode = unit_mode;
164 btrfs_qgroup_columns[BTRFS_QGROUP_EXCL].unit_mode = unit_mode;
165 btrfs_qgroup_columns[BTRFS_QGROUP_MAX_RFER].unit_mode = unit_mode;
166 btrfs_qgroup_columns[BTRFS_QGROUP_MAX_EXCL].unit_mode = unit_mode;
167 }
168
169 static int print_parent_column(struct btrfs_qgroup *qgroup)
170 {
171 struct btrfs_qgroup_list *list = NULL;
172 int len = 0;
173
174 list_for_each_entry(list, &qgroup->qgroups, next_qgroup) {
175 len += printf("%llu/%llu",
176 btrfs_qgroup_level(list->qgroup->qgroupid),
177 btrfs_qgroup_subvid(list->qgroup->qgroupid));
178 if (!list_is_last(&list->next_qgroup, &qgroup->qgroups))
179 len += printf(",");
180 }
181 if (list_empty(&qgroup->qgroups))
182 len += printf("---");
183
184 return len;
185 }
186
187 static int print_child_column(struct btrfs_qgroup *qgroup)
188 {
189 struct btrfs_qgroup_list *list = NULL;
190 int len = 0;
191
192 list_for_each_entry(list, &qgroup->members, next_member) {
193 len += printf("%llu/%llu",
194 btrfs_qgroup_level(list->member->qgroupid),
195 btrfs_qgroup_subvid(list->member->qgroupid));
196 if (!list_is_last(&list->next_member, &qgroup->members))
197 len += printf(",");
198 }
199 if (list_empty(&qgroup->members))
200 len += printf("---");
201
202 return len;
203 }
204
205 static void print_qgroup_column_add_blank(enum btrfs_qgroup_column_enum column,
206 int len)
207 {
208 len = btrfs_qgroup_columns[column].max_len - len;
209 while (len--)
210 printf(" ");
211 }
212
213 static void print_qgroup_column(struct btrfs_qgroup *qgroup,
214 enum btrfs_qgroup_column_enum column)
215 {
216 int len;
217 int unit_mode = btrfs_qgroup_columns[column].unit_mode;
218 int max_len = btrfs_qgroup_columns[column].max_len;
219
220 ASSERT(0 <= column && column < BTRFS_QGROUP_ALL);
221
222 switch (column) {
223
224 case BTRFS_QGROUP_QGROUPID:
225 len = printf("%llu/%llu",
226 btrfs_qgroup_level(qgroup->qgroupid),
227 btrfs_qgroup_subvid(qgroup->qgroupid));
228 print_qgroup_column_add_blank(BTRFS_QGROUP_QGROUPID, len);
229 break;
230 case BTRFS_QGROUP_RFER:
231 len = printf("%*s", max_len, pretty_size_mode(qgroup->rfer, unit_mode));
232 break;
233 case BTRFS_QGROUP_EXCL:
234 len = printf("%*s", max_len, pretty_size_mode(qgroup->excl, unit_mode));
235 break;
236 case BTRFS_QGROUP_PARENT:
237 len = print_parent_column(qgroup);
238 print_qgroup_column_add_blank(BTRFS_QGROUP_PARENT, len);
239 break;
240 case BTRFS_QGROUP_MAX_RFER:
241 if (qgroup->flags & BTRFS_QGROUP_LIMIT_MAX_RFER)
242 len = printf("%*s", max_len, pretty_size_mode(qgroup->max_rfer, unit_mode));
243 else
244 len = printf("%*s", max_len, "none");
245 break;
246 case BTRFS_QGROUP_MAX_EXCL:
247 if (qgroup->flags & BTRFS_QGROUP_LIMIT_MAX_EXCL)
248 len = printf("%*s", max_len, pretty_size_mode(qgroup->max_excl, unit_mode));
249 else
250 len = printf("%*s", max_len, "none");
251 break;
252 case BTRFS_QGROUP_CHILD:
253 len = print_child_column(qgroup);
254 print_qgroup_column_add_blank(BTRFS_QGROUP_CHILD, len);
255 break;
256 default:
257 break;
258 }
259 }
260
261 static void print_single_qgroup_table(struct btrfs_qgroup *qgroup)
262 {
263 int i;
264
265 for (i = 0; i < BTRFS_QGROUP_ALL; i++) {
266 if (!btrfs_qgroup_columns[i].need_print)
267 continue;
268 print_qgroup_column(qgroup, i);
269
270 if (i != BTRFS_QGROUP_CHILD)
271 printf(" ");
272 }
273 printf("\n");
274 }
275
276 static void print_table_head(void)
277 {
278 int i;
279 int len;
280 int max_len;
281
282 for (i = 0; i < BTRFS_QGROUP_ALL; i++) {
283 max_len = btrfs_qgroup_columns[i].max_len;
284 if (!btrfs_qgroup_columns[i].need_print)
285 continue;
286 if ((i == BTRFS_QGROUP_QGROUPID) | (i == BTRFS_QGROUP_PARENT) |
287 (i == BTRFS_QGROUP_CHILD))
288 printf("%-*s", max_len, btrfs_qgroup_columns[i].name);
289 else
290 printf("%*s", max_len, btrfs_qgroup_columns[i].name);
291 printf(" ");
292 }
293 printf("\n");
294 for (i = 0; i < BTRFS_QGROUP_ALL; i++) {
295 max_len = btrfs_qgroup_columns[i].max_len;
296 if (!btrfs_qgroup_columns[i].need_print)
297 continue;
298 if ((i == BTRFS_QGROUP_QGROUPID) | (i == BTRFS_QGROUP_PARENT) |
299 (i == BTRFS_QGROUP_CHILD)) {
300 len = strlen(btrfs_qgroup_columns[i].name);
301 while (len--)
302 printf("-");
303 len = max_len - strlen(btrfs_qgroup_columns[i].name);
304 while (len--)
305 printf(" ");
306 } else {
307 len = max_len - strlen(btrfs_qgroup_columns[i].name);
308 while (len--)
309 printf(" ");
310 len = strlen(btrfs_qgroup_columns[i].name);
311 while (len--)
312 printf("-");
313 }
314 printf(" ");
315 }
316 printf("\n");
317 }
318
319 static void qgroup_lookup_init(struct qgroup_lookup *tree)
320 {
321 tree->root.rb_node = NULL;
322 }
323
324 static int comp_entry_with_qgroupid(struct btrfs_qgroup *entry1,
325 struct btrfs_qgroup *entry2,
326 int is_descending)
327 {
328
329 int ret;
330
331 if (entry1->qgroupid > entry2->qgroupid)
332 ret = 1;
333 else if (entry1->qgroupid < entry2->qgroupid)
334 ret = -1;
335 else
336 ret = 0;
337
338 return is_descending ? -ret : ret;
339 }
340
341 static int comp_entry_with_rfer(struct btrfs_qgroup *entry1,
342 struct btrfs_qgroup *entry2,
343 int is_descending)
344 {
345 int ret;
346
347 if (entry1->rfer > entry2->rfer)
348 ret = 1;
349 else if (entry1->rfer < entry2->rfer)
350 ret = -1;
351 else
352 ret = 0;
353
354 return is_descending ? -ret : ret;
355 }
356
357 static int comp_entry_with_excl(struct btrfs_qgroup *entry1,
358 struct btrfs_qgroup *entry2,
359 int is_descending)
360 {
361 int ret;
362
363 if (entry1->excl > entry2->excl)
364 ret = 1;
365 else if (entry1->excl < entry2->excl)
366 ret = -1;
367 else
368 ret = 0;
369
370 return is_descending ? -ret : ret;
371 }
372
373 static int comp_entry_with_max_rfer(struct btrfs_qgroup *entry1,
374 struct btrfs_qgroup *entry2,
375 int is_descending)
376 {
377 int ret;
378
379 if (entry1->max_rfer > entry2->max_rfer)
380 ret = 1;
381 else if (entry1->max_rfer < entry2->max_rfer)
382 ret = -1;
383 else
384 ret = 0;
385
386 return is_descending ? -ret : ret;
387 }
388
389 static int comp_entry_with_max_excl(struct btrfs_qgroup *entry1,
390 struct btrfs_qgroup *entry2,
391 int is_descending)
392 {
393 int ret;
394
395 if (entry1->max_excl > entry2->max_excl)
396 ret = 1;
397 else if (entry1->max_excl < entry2->max_excl)
398 ret = -1;
399 else
400 ret = 0;
401
402 return is_descending ? -ret : ret;
403 }
404
405 static btrfs_qgroup_comp_func all_comp_funcs[] = {
406 [BTRFS_QGROUP_COMP_QGROUPID] = comp_entry_with_qgroupid,
407 [BTRFS_QGROUP_COMP_RFER] = comp_entry_with_rfer,
408 [BTRFS_QGROUP_COMP_EXCL] = comp_entry_with_excl,
409 [BTRFS_QGROUP_COMP_MAX_RFER] = comp_entry_with_max_rfer,
410 [BTRFS_QGROUP_COMP_MAX_EXCL] = comp_entry_with_max_excl
411 };
412
413 static char *all_sort_items[] = {
414 [BTRFS_QGROUP_COMP_QGROUPID] = "qgroupid",
415 [BTRFS_QGROUP_COMP_RFER] = "rfer",
416 [BTRFS_QGROUP_COMP_EXCL] = "excl",
417 [BTRFS_QGROUP_COMP_MAX_RFER] = "max_rfer",
418 [BTRFS_QGROUP_COMP_MAX_EXCL] = "max_excl",
419 [BTRFS_QGROUP_COMP_MAX] = NULL,
420 };
421
422 static int btrfs_qgroup_get_sort_item(char *sort_name)
423 {
424 int i;
425
426 for (i = 0; i < BTRFS_QGROUP_COMP_MAX; i++) {
427 if (strcmp(sort_name, all_sort_items[i]) == 0)
428 return i;
429 }
430 return -1;
431 }
432
433 struct btrfs_qgroup_comparer_set *btrfs_qgroup_alloc_comparer_set(void)
434 {
435 struct btrfs_qgroup_comparer_set *set;
436 int size;
437 size = sizeof(struct btrfs_qgroup_comparer_set) +
438 BTRFS_QGROUP_NCOMPS_INCREASE *
439 sizeof(struct btrfs_qgroup_comparer);
440 set = calloc(1, size);
441 if (!set) {
442 error("memory allocation failed");
443 exit(1);
444 }
445
446 set->total = BTRFS_QGROUP_NCOMPS_INCREASE;
447
448 return set;
449 }
450
451 int btrfs_qgroup_setup_comparer(struct btrfs_qgroup_comparer_set **comp_set,
452 enum btrfs_qgroup_comp_enum comparer,
453 int is_descending)
454 {
455 struct btrfs_qgroup_comparer_set *set = *comp_set;
456 int size;
457
458 ASSERT(set != NULL);
459 ASSERT(comparer < BTRFS_QGROUP_COMP_MAX);
460 ASSERT(set->ncomps <= set->total);
461
462 if (set->ncomps == set->total) {
463 void *tmp;
464
465 size = set->total + BTRFS_QGROUP_NCOMPS_INCREASE;
466 size = sizeof(*set) +
467 size * sizeof(struct btrfs_qgroup_comparer);
468 tmp = set;
469 set = realloc(set, size);
470 if (!set) {
471 error("memory allocation failed");
472 free(tmp);
473 exit(1);
474 }
475
476 memset(&set->comps[set->total], 0,
477 BTRFS_QGROUP_NCOMPS_INCREASE *
478 sizeof(struct btrfs_qgroup_comparer));
479 set->total += BTRFS_QGROUP_NCOMPS_INCREASE;
480 *comp_set = set;
481 }
482
483 ASSERT(set->comps[set->ncomps].comp_func == NULL);
484
485 set->comps[set->ncomps].comp_func = all_comp_funcs[comparer];
486 set->comps[set->ncomps].is_descending = is_descending;
487 set->ncomps++;
488 return 0;
489 }
490
491 static int sort_comp(struct btrfs_qgroup *entry1, struct btrfs_qgroup *entry2,
492 struct btrfs_qgroup_comparer_set *set)
493 {
494 int qgroupid_compared = 0;
495 int i, ret = 0;
496
497 if (!set || !set->ncomps)
498 goto comp_qgroupid;
499
500 for (i = 0; i < set->ncomps; i++) {
501 if (!set->comps[i].comp_func)
502 break;
503
504 ret = set->comps[i].comp_func(entry1, entry2,
505 set->comps[i].is_descending);
506 if (ret)
507 return ret;
508
509 if (set->comps[i].comp_func == comp_entry_with_qgroupid)
510 qgroupid_compared = 1;
511 }
512
513 if (!qgroupid_compared) {
514 comp_qgroupid:
515 ret = comp_entry_with_qgroupid(entry1, entry2, 0);
516 }
517
518 return ret;
519 }
520
521 /*
522 * insert a new root into the tree. returns the existing root entry
523 * if one is already there. qgroupid is used
524 * as the key
525 */
526 static int qgroup_tree_insert(struct qgroup_lookup *root_tree,
527 struct btrfs_qgroup *ins)
528 {
529
530 struct rb_node **p = &root_tree->root.rb_node;
531 struct rb_node *parent = NULL;
532 struct btrfs_qgroup *curr;
533 int ret;
534
535 while (*p) {
536 parent = *p;
537 curr = rb_entry(parent, struct btrfs_qgroup, rb_node);
538
539 ret = comp_entry_with_qgroupid(ins, curr, 0);
540 if (ret < 0)
541 p = &(*p)->rb_left;
542 else if (ret > 0)
543 p = &(*p)->rb_right;
544 else
545 return -EEXIST;
546 }
547 rb_link_node(&ins->rb_node, parent, p);
548 rb_insert_color(&ins->rb_node, &root_tree->root);
549 return 0;
550 }
551
552 /*
553 *find a given qgroupid in the tree. We return the smallest one,
554 *rb_next can be used to move forward looking for more if required
555 */
556 static struct btrfs_qgroup *qgroup_tree_search(struct qgroup_lookup *root_tree,
557 u64 qgroupid)
558 {
559 struct rb_node *n = root_tree->root.rb_node;
560 struct btrfs_qgroup *entry;
561 struct btrfs_qgroup tmp;
562 int ret;
563
564 tmp.qgroupid = qgroupid;
565
566 while (n) {
567 entry = rb_entry(n, struct btrfs_qgroup, rb_node);
568
569 ret = comp_entry_with_qgroupid(&tmp, entry, 0);
570 if (ret < 0)
571 n = n->rb_left;
572 else if (ret > 0)
573 n = n->rb_right;
574 else
575 return entry;
576
577 }
578 return NULL;
579 }
580
581 /*
582 * Lookup or insert btrfs_qgroup into qgroup_lookup.
583 *
584 * Search a btrfs_qgroup with @qgroupid from the @qgroup_lookup. If not found,
585 * initialize a btrfs_qgroup with the given qgroupid and insert it to the
586 * @qgroup_lookup.
587 *
588 * Return the pointer to the btrfs_qgroup if found or if inserted successfully.
589 * Return ERR_PTR if any error occurred.
590 */
591 static struct btrfs_qgroup *get_or_add_qgroup(
592 struct qgroup_lookup *qgroup_lookup, u64 qgroupid)
593 {
594 struct btrfs_qgroup *bq;
595 int ret;
596
597 bq = qgroup_tree_search(qgroup_lookup, qgroupid);
598 if (bq)
599 return bq;
600
601 bq = calloc(1, sizeof(*bq));
602 if (!bq) {
603 error("memory allocation failed");
604 return ERR_PTR(-ENOMEM);
605 }
606
607 bq->qgroupid = qgroupid;
608 INIT_LIST_HEAD(&bq->qgroups);
609 INIT_LIST_HEAD(&bq->members);
610
611 ret = qgroup_tree_insert(qgroup_lookup, bq);
612 if (ret) {
613 error("failed to insert %llu into tree: %s",
614 (unsigned long long)bq->qgroupid, strerror(-ret));
615 free(bq);
616 return ERR_PTR(ret);
617 }
618
619 return bq;
620 }
621
622 static int update_qgroup_info(struct qgroup_lookup *qgroup_lookup, u64 qgroupid,
623 struct btrfs_qgroup_info_item *info)
624 {
625 struct btrfs_qgroup *bq;
626
627 bq = get_or_add_qgroup(qgroup_lookup, qgroupid);
628 if (IS_ERR_OR_NULL(bq))
629 return PTR_ERR(bq);
630
631 bq->generation = btrfs_stack_qgroup_info_generation(info);
632 bq->rfer = btrfs_stack_qgroup_info_referenced(info);
633 bq->rfer_cmpr = btrfs_stack_qgroup_info_referenced_compressed(info);
634 bq->excl = btrfs_stack_qgroup_info_exclusive(info);
635 bq->excl_cmpr = btrfs_stack_qgroup_info_exclusive_compressed(info);
636
637 return 0;
638 }
639
640 static int update_qgroup_limit(struct qgroup_lookup *qgroup_lookup,
641 u64 qgroupid,
642 struct btrfs_qgroup_limit_item *limit)
643 {
644 struct btrfs_qgroup *bq;
645
646 bq = get_or_add_qgroup(qgroup_lookup, qgroupid);
647 if (IS_ERR_OR_NULL(bq))
648 return PTR_ERR(bq);
649
650 bq->flags = btrfs_stack_qgroup_limit_flags(limit);
651 bq->max_rfer = btrfs_stack_qgroup_limit_max_referenced(limit);
652 bq->max_excl = btrfs_stack_qgroup_limit_max_exclusive(limit);
653 bq->rsv_rfer = btrfs_stack_qgroup_limit_rsv_referenced(limit);
654 bq->rsv_excl = btrfs_stack_qgroup_limit_rsv_exclusive(limit);
655
656 return 0;
657 }
658
659 static int update_qgroup_relation(struct qgroup_lookup *qgroup_lookup,
660 u64 child_id, u64 parent_id)
661 {
662 struct btrfs_qgroup *child;
663 struct btrfs_qgroup *parent;
664 struct btrfs_qgroup_list *list;
665
666 child = qgroup_tree_search(qgroup_lookup, child_id);
667 if (!child) {
668 error("cannot find the qgroup %llu/%llu",
669 btrfs_qgroup_level(child_id),
670 btrfs_qgroup_subvid(child_id));
671 return -ENOENT;
672 }
673
674 parent = qgroup_tree_search(qgroup_lookup, parent_id);
675 if (!parent) {
676 error("cannot find the qgroup %llu/%llu",
677 btrfs_qgroup_level(parent_id),
678 btrfs_qgroup_subvid(parent_id));
679 return -ENOENT;
680 }
681
682 list = malloc(sizeof(*list));
683 if (!list) {
684 error("memory allocation failed");
685 return -ENOMEM;
686 }
687
688 list->qgroup = parent;
689 list->member = child;
690 list_add_tail(&list->next_qgroup, &child->qgroups);
691 list_add_tail(&list->next_member, &parent->members);
692
693 return 0;
694 }
695
696 static void __free_btrfs_qgroup(struct btrfs_qgroup *bq)
697 {
698 struct btrfs_qgroup_list *list;
699 while (!list_empty(&bq->qgroups)) {
700 list = list_entry((&bq->qgroups)->next,
701 struct btrfs_qgroup_list,
702 next_qgroup);
703 list_del(&list->next_qgroup);
704 list_del(&list->next_member);
705 free(list);
706 }
707 while (!list_empty(&bq->members)) {
708 list = list_entry((&bq->members)->next,
709 struct btrfs_qgroup_list,
710 next_member);
711 list_del(&list->next_qgroup);
712 list_del(&list->next_member);
713 free(list);
714 }
715 free(bq);
716 }
717
718 static void __free_all_qgroups(struct qgroup_lookup *root_tree)
719 {
720 struct btrfs_qgroup *entry;
721 struct rb_node *n;
722
723 n = rb_first(&root_tree->root);
724 while (n) {
725 entry = rb_entry(n, struct btrfs_qgroup, rb_node);
726 rb_erase(n, &root_tree->root);
727 __free_btrfs_qgroup(entry);
728
729 n = rb_first(&root_tree->root);
730 }
731 }
732
733 static int filter_all_parent_insert(struct qgroup_lookup *sort_tree,
734 struct btrfs_qgroup *bq)
735 {
736 struct rb_node **p = &sort_tree->root.rb_node;
737 struct rb_node *parent = NULL;
738 struct btrfs_qgroup *curr;
739 int ret;
740
741 while (*p) {
742 parent = *p;
743 curr = rb_entry(parent, struct btrfs_qgroup, all_parent_node);
744
745 ret = comp_entry_with_qgroupid(bq, curr, 0);
746 if (ret < 0)
747 p = &(*p)->rb_left;
748 else if (ret > 0)
749 p = &(*p)->rb_right;
750 else
751 return -EEXIST;
752 }
753 rb_link_node(&bq->all_parent_node, parent, p);
754 rb_insert_color(&bq->all_parent_node, &sort_tree->root);
755 return 0;
756 }
757
758 static int filter_by_parent(struct btrfs_qgroup *bq, u64 data)
759 {
760 struct btrfs_qgroup *qgroup =
761 (struct btrfs_qgroup *)(unsigned long)data;
762
763 if (data == 0)
764 return 0;
765 if (qgroup->qgroupid == bq->qgroupid)
766 return 1;
767 return 0;
768 }
769
770 static int filter_by_all_parent(struct btrfs_qgroup *bq, u64 data)
771 {
772 struct qgroup_lookup lookup;
773 struct qgroup_lookup *ql = &lookup;
774 struct btrfs_qgroup_list *list;
775 struct rb_node *n;
776 struct btrfs_qgroup *qgroup =
777 (struct btrfs_qgroup *)(unsigned long)data;
778
779 if (data == 0)
780 return 0;
781 if (bq->qgroupid == qgroup->qgroupid)
782 return 1;
783
784 qgroup_lookup_init(ql);
785 filter_all_parent_insert(ql, qgroup);
786 n = rb_first(&ql->root);
787 while (n) {
788 qgroup = rb_entry(n, struct btrfs_qgroup, all_parent_node);
789 if (!list_empty(&qgroup->qgroups)) {
790 list_for_each_entry(list, &qgroup->qgroups,
791 next_qgroup) {
792 if ((list->qgroup)->qgroupid == bq->qgroupid)
793 return 1;
794 filter_all_parent_insert(ql, list->qgroup);
795 }
796 }
797 rb_erase(n, &ql->root);
798 n = rb_first(&ql->root);
799 }
800 return 0;
801 }
802
803 static btrfs_qgroup_filter_func all_filter_funcs[] = {
804 [BTRFS_QGROUP_FILTER_PARENT] = filter_by_parent,
805 [BTRFS_QGROUP_FILTER_ALL_PARENT] = filter_by_all_parent,
806 };
807
808 struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void)
809 {
810 struct btrfs_qgroup_filter_set *set;
811 int size;
812
813 size = sizeof(struct btrfs_qgroup_filter_set) +
814 BTRFS_QGROUP_NFILTERS_INCREASE *
815 sizeof(struct btrfs_qgroup_filter);
816 set = calloc(1, size);
817 if (!set) {
818 error("memory allocation failed");
819 exit(1);
820 }
821 set->total = BTRFS_QGROUP_NFILTERS_INCREASE;
822
823 return set;
824 }
825
826 int btrfs_qgroup_setup_filter(struct btrfs_qgroup_filter_set **filter_set,
827 enum btrfs_qgroup_filter_enum filter, u64 data)
828 {
829 struct btrfs_qgroup_filter_set *set = *filter_set;
830 int size;
831
832 ASSERT(set != NULL);
833 ASSERT(filter < BTRFS_QGROUP_FILTER_MAX);
834 ASSERT(set->nfilters <= set->total);
835
836 if (set->nfilters == set->total) {
837 void *tmp;
838
839 size = set->total + BTRFS_QGROUP_NFILTERS_INCREASE;
840 size = sizeof(*set) + size * sizeof(struct btrfs_qgroup_filter);
841
842 tmp = set;
843 set = realloc(set, size);
844 if (!set) {
845 error("memory allocation failed");
846 free(tmp);
847 exit(1);
848 }
849 memset(&set->filters[set->total], 0,
850 BTRFS_QGROUP_NFILTERS_INCREASE *
851 sizeof(struct btrfs_qgroup_filter));
852 set->total += BTRFS_QGROUP_NFILTERS_INCREASE;
853 *filter_set = set;
854 }
855
856 ASSERT(set->filters[set->nfilters].filter_func == NULL);
857 set->filters[set->nfilters].filter_func = all_filter_funcs[filter];
858 set->filters[set->nfilters].data = data;
859 set->nfilters++;
860 return 0;
861 }
862
863 static int filter_qgroup(struct btrfs_qgroup *bq,
864 struct btrfs_qgroup_filter_set *set)
865 {
866 int i, ret;
867
868 if (!set || !set->nfilters)
869 return 1;
870 for (i = 0; i < set->nfilters; i++) {
871 if (!set->filters[i].filter_func)
872 break;
873 ret = set->filters[i].filter_func(bq, set->filters[i].data);
874 if (!ret)
875 return 0;
876 }
877 return 1;
878 }
879
880 static void pre_process_filter_set(struct qgroup_lookup *lookup,
881 struct btrfs_qgroup_filter_set *set)
882 {
883 int i;
884 struct btrfs_qgroup *qgroup_for_filter = NULL;
885
886 for (i = 0; i < set->nfilters; i++) {
887
888 if (set->filters[i].filter_func == filter_by_all_parent
889 || set->filters[i].filter_func == filter_by_parent) {
890 qgroup_for_filter = qgroup_tree_search(lookup,
891 set->filters[i].data);
892 set->filters[i].data =
893 (u64)(unsigned long)qgroup_for_filter;
894 }
895 }
896 }
897
898 static int sort_tree_insert(struct qgroup_lookup *sort_tree,
899 struct btrfs_qgroup *bq,
900 struct btrfs_qgroup_comparer_set *comp_set)
901 {
902 struct rb_node **p = &sort_tree->root.rb_node;
903 struct rb_node *parent = NULL;
904 struct btrfs_qgroup *curr;
905 int ret;
906
907 while (*p) {
908 parent = *p;
909 curr = rb_entry(parent, struct btrfs_qgroup, sort_node);
910
911 ret = sort_comp(bq, curr, comp_set);
912 if (ret < 0)
913 p = &(*p)->rb_left;
914 else if (ret > 0)
915 p = &(*p)->rb_right;
916 else
917 return -EEXIST;
918 }
919 rb_link_node(&bq->sort_node, parent, p);
920 rb_insert_color(&bq->sort_node, &sort_tree->root);
921 return 0;
922 }
923
924 static void __update_columns_max_len(struct btrfs_qgroup *bq,
925 enum btrfs_qgroup_column_enum column)
926 {
927 struct btrfs_qgroup_list *list = NULL;
928 char tmp[100];
929 int len;
930 unsigned unit_mode = btrfs_qgroup_columns[column].unit_mode;
931
932 ASSERT(0 <= column && column < BTRFS_QGROUP_ALL);
933
934 switch (column) {
935
936 case BTRFS_QGROUP_QGROUPID:
937 sprintf(tmp, "%llu/%llu",
938 btrfs_qgroup_level(bq->qgroupid),
939 btrfs_qgroup_subvid(bq->qgroupid));
940 len = strlen(tmp);
941 if (btrfs_qgroup_columns[column].max_len < len)
942 btrfs_qgroup_columns[column].max_len = len;
943 break;
944 case BTRFS_QGROUP_RFER:
945 len = strlen(pretty_size_mode(bq->rfer, unit_mode));
946 if (btrfs_qgroup_columns[column].max_len < len)
947 btrfs_qgroup_columns[column].max_len = len;
948 break;
949 case BTRFS_QGROUP_EXCL:
950 len = strlen(pretty_size_mode(bq->excl, unit_mode));
951 if (btrfs_qgroup_columns[column].max_len < len)
952 btrfs_qgroup_columns[column].max_len = len;
953 break;
954 case BTRFS_QGROUP_MAX_RFER:
955 len = strlen(pretty_size_mode(bq->max_rfer, unit_mode));
956 if (btrfs_qgroup_columns[column].max_len < len)
957 btrfs_qgroup_columns[column].max_len = len;
958 break;
959 case BTRFS_QGROUP_MAX_EXCL:
960 len = strlen(pretty_size_mode(bq->max_excl, unit_mode));
961 if (btrfs_qgroup_columns[column].max_len < len)
962 btrfs_qgroup_columns[column].max_len = len;
963 break;
964 case BTRFS_QGROUP_PARENT:
965 len = 0;
966 list_for_each_entry(list, &bq->qgroups, next_qgroup) {
967 len += sprintf(tmp, "%llu/%llu",
968 btrfs_qgroup_level(list->qgroup->qgroupid),
969 btrfs_qgroup_subvid(list->qgroup->qgroupid));
970 if (!list_is_last(&list->next_qgroup, &bq->qgroups))
971 len += 1;
972 }
973 if (btrfs_qgroup_columns[column].max_len < len)
974 btrfs_qgroup_columns[column].max_len = len;
975 break;
976 case BTRFS_QGROUP_CHILD:
977 len = 0;
978 list_for_each_entry(list, &bq->members, next_member) {
979 len += sprintf(tmp, "%llu/%llu",
980 btrfs_qgroup_level(list->member->qgroupid),
981 btrfs_qgroup_subvid(list->member->qgroupid));
982 if (!list_is_last(&list->next_member, &bq->members))
983 len += 1;
984 }
985 if (btrfs_qgroup_columns[column].max_len < len)
986 btrfs_qgroup_columns[column].max_len = len;
987 break;
988 default:
989 break;
990 }
991
992 }
993
994 static void update_columns_max_len(struct btrfs_qgroup *bq)
995 {
996 int i;
997
998 for (i = 0; i < BTRFS_QGROUP_ALL; i++) {
999 if (!btrfs_qgroup_columns[i].need_print)
1000 continue;
1001 __update_columns_max_len(bq, i);
1002 }
1003 }
1004
1005 static void __filter_and_sort_qgroups(struct qgroup_lookup *all_qgroups,
1006 struct qgroup_lookup *sort_tree,
1007 struct btrfs_qgroup_filter_set *filter_set,
1008 struct btrfs_qgroup_comparer_set *comp_set)
1009 {
1010 struct rb_node *n;
1011 struct btrfs_qgroup *entry;
1012 int ret;
1013
1014 qgroup_lookup_init(sort_tree);
1015 pre_process_filter_set(all_qgroups, filter_set);
1016
1017 n = rb_last(&all_qgroups->root);
1018 while (n) {
1019 entry = rb_entry(n, struct btrfs_qgroup, rb_node);
1020
1021 ret = filter_qgroup(entry, filter_set);
1022 if (ret) {
1023 sort_tree_insert(sort_tree, entry, comp_set);
1024
1025 update_columns_max_len(entry);
1026 }
1027 n = rb_prev(n);
1028 }
1029 }
1030
1031 static inline void print_status_flag_warning(u64 flags)
1032 {
1033 if (!(flags & BTRFS_QGROUP_STATUS_FLAG_ON))
1034 warning("quota disabled, qgroup data may be out of date");
1035 else if (flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
1036 warning("rescan is running, qgroup data may be incorrect");
1037 else if (flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT)
1038 warning("qgroup data inconsistent, rescan recommended");
1039 }
1040
1041 static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
1042 {
1043 int ret;
1044 struct btrfs_ioctl_search_args args;
1045 struct btrfs_ioctl_search_key *sk = &args.key;
1046 struct btrfs_ioctl_search_header *sh;
1047 unsigned long off = 0;
1048 unsigned int i;
1049 struct btrfs_qgroup_status_item *si;
1050 struct btrfs_qgroup_info_item *info;
1051 struct btrfs_qgroup_limit_item *limit;
1052 u64 flags;
1053 u64 qgroupid;
1054 u64 child, parent;
1055
1056 memset(&args, 0, sizeof(args));
1057
1058 sk->tree_id = BTRFS_QUOTA_TREE_OBJECTID;
1059 sk->max_type = BTRFS_QGROUP_RELATION_KEY;
1060 sk->min_type = BTRFS_QGROUP_STATUS_KEY;
1061 sk->max_objectid = (u64)-1;
1062 sk->max_offset = (u64)-1;
1063 sk->max_transid = (u64)-1;
1064 sk->nr_items = 4096;
1065
1066 qgroup_lookup_init(qgroup_lookup);
1067
1068 while (1) {
1069 ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
1070 if (ret < 0) {
1071 if (errno == ENOENT) {
1072 error("can't list qgroups: quotas not enabled");
1073 ret = -ENOTTY;
1074 } else {
1075 error("can't list qgroups: %s",
1076 strerror(errno));
1077 ret = -errno;
1078 }
1079
1080 break;
1081 }
1082
1083 /* the ioctl returns the number of item it found in nr_items */
1084 if (sk->nr_items == 0)
1085 break;
1086
1087 off = 0;
1088 /*
1089 * for each item, pull the key out of the header and then
1090 * read the root_ref item it contains
1091 */
1092 for (i = 0; i < sk->nr_items; i++) {
1093 sh = (struct btrfs_ioctl_search_header *)(args.buf +
1094 off);
1095 off += sizeof(*sh);
1096
1097 switch (btrfs_search_header_type(sh)) {
1098 case BTRFS_QGROUP_STATUS_KEY:
1099 si = (struct btrfs_qgroup_status_item *)
1100 (args.buf + off);
1101 flags = btrfs_stack_qgroup_status_flags(si);
1102
1103 print_status_flag_warning(flags);
1104 break;
1105 case BTRFS_QGROUP_INFO_KEY:
1106 qgroupid = btrfs_search_header_offset(sh);
1107 info = (struct btrfs_qgroup_info_item *)
1108 (args.buf + off);
1109
1110 ret = update_qgroup_info(qgroup_lookup,
1111 qgroupid, info);
1112 break;
1113 case BTRFS_QGROUP_LIMIT_KEY:
1114 qgroupid = btrfs_search_header_offset(sh);
1115 limit = (struct btrfs_qgroup_limit_item *)
1116 (args.buf + off);
1117
1118 ret = update_qgroup_limit(qgroup_lookup,
1119 qgroupid, limit);
1120 break;
1121 case BTRFS_QGROUP_RELATION_KEY:
1122 child = btrfs_search_header_offset(sh);
1123 parent = btrfs_search_header_objectid(sh);
1124
1125 if (parent <= child)
1126 break;
1127
1128 ret = update_qgroup_relation(qgroup_lookup,
1129 child, parent);
1130 break;
1131 default:
1132 return ret;
1133 }
1134
1135 if (ret)
1136 return ret;
1137
1138 off += btrfs_search_header_len(sh);
1139
1140 /*
1141 * record the mins in sk so we can make sure the
1142 * next search doesn't repeat this root
1143 */
1144 sk->min_type = btrfs_search_header_type(sh);
1145 sk->min_offset = btrfs_search_header_offset(sh);
1146 sk->min_objectid = btrfs_search_header_objectid(sh);
1147 }
1148 sk->nr_items = 4096;
1149 /*
1150 * this iteration is done, step forward one qgroup for the next
1151 * ioctl
1152 */
1153 if (sk->min_offset < (u64)-1)
1154 sk->min_offset++;
1155 else
1156 break;
1157 }
1158
1159 return ret;
1160 }
1161
1162 static void print_all_qgroups(struct qgroup_lookup *qgroup_lookup)
1163 {
1164
1165 struct rb_node *n;
1166 struct btrfs_qgroup *entry;
1167
1168 print_table_head();
1169
1170 n = rb_first(&qgroup_lookup->root);
1171 while (n) {
1172 entry = rb_entry(n, struct btrfs_qgroup, sort_node);
1173 print_single_qgroup_table(entry);
1174 n = rb_next(n);
1175 }
1176 }
1177
1178 int btrfs_show_qgroups(int fd,
1179 struct btrfs_qgroup_filter_set *filter_set,
1180 struct btrfs_qgroup_comparer_set *comp_set)
1181 {
1182
1183 struct qgroup_lookup qgroup_lookup;
1184 struct qgroup_lookup sort_tree;
1185 int ret;
1186
1187 ret = __qgroups_search(fd, &qgroup_lookup);
1188 if (ret)
1189 return ret;
1190 __filter_and_sort_qgroups(&qgroup_lookup, &sort_tree,
1191 filter_set, comp_set);
1192 print_all_qgroups(&sort_tree);
1193
1194 __free_all_qgroups(&qgroup_lookup);
1195 return ret;
1196 }
1197
1198 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
1199 struct btrfs_qgroup_comparer_set **comps)
1200 {
1201 int order;
1202 int flag;
1203 char *p;
1204 char **ptr_argv;
1205 int what_to_sort;
1206 char *opt_tmp;
1207 int ret = 0;
1208
1209 opt_tmp = strdup(opt_arg);
1210 if (!opt_tmp)
1211 return -ENOMEM;
1212
1213 p = strtok(opt_tmp, ",");
1214 while (p) {
1215 flag = 0;
1216 ptr_argv = all_sort_items;
1217
1218 while (*ptr_argv) {
1219 if (strcmp(*ptr_argv, p) == 0) {
1220 flag = 1;
1221 break;
1222 } else {
1223 p++;
1224 if (strcmp(*ptr_argv, p) == 0) {
1225 flag = 1;
1226 p--;
1227 break;
1228 }
1229 p--;
1230 }
1231 ptr_argv++;
1232 }
1233
1234 if (flag == 0) {
1235 ret = -1;
1236 goto out;
1237 } else {
1238 if (*p == '+') {
1239 order = 0;
1240 p++;
1241 } else if (*p == '-') {
1242 order = 1;
1243 p++;
1244 } else
1245 order = 0;
1246
1247 what_to_sort = btrfs_qgroup_get_sort_item(p);
1248 if (what_to_sort < 0) {
1249 ret = -1;
1250 goto out;
1251 }
1252 btrfs_qgroup_setup_comparer(comps, what_to_sort, order);
1253 }
1254 p = strtok(NULL, ",");
1255 }
1256
1257 out:
1258 free(opt_tmp);
1259 return ret;
1260 }
1261
1262 int qgroup_inherit_size(struct btrfs_qgroup_inherit *p)
1263 {
1264 return sizeof(*p) + sizeof(p->qgroups[0]) *
1265 (p->num_qgroups + 2 * p->num_ref_copies +
1266 2 * p->num_excl_copies);
1267 }
1268
1269 static int
1270 qgroup_inherit_realloc(struct btrfs_qgroup_inherit **inherit, int n, int pos)
1271 {
1272 struct btrfs_qgroup_inherit *out;
1273 int nitems = 0;
1274
1275 if (*inherit) {
1276 nitems = (*inherit)->num_qgroups +
1277 (*inherit)->num_ref_copies +
1278 (*inherit)->num_excl_copies;
1279 }
1280
1281 out = calloc(sizeof(*out) + sizeof(out->qgroups[0]) * (nitems + n), 1);
1282 if (out == NULL) {
1283 error("not enough memory");
1284 return -ENOMEM;
1285 }
1286
1287 if (*inherit) {
1288 struct btrfs_qgroup_inherit *i = *inherit;
1289 int s = sizeof(out->qgroups[0]);
1290
1291 out->num_qgroups = i->num_qgroups;
1292 out->num_ref_copies = i->num_ref_copies;
1293 out->num_excl_copies = i->num_excl_copies;
1294 memcpy(out->qgroups, i->qgroups, pos * s);
1295 memcpy(out->qgroups + pos + n, i->qgroups + pos,
1296 (nitems - pos) * s);
1297 }
1298 free(*inherit);
1299 *inherit = out;
1300
1301 return 0;
1302 }
1303
1304 int qgroup_inherit_add_group(struct btrfs_qgroup_inherit **inherit, char *arg)
1305 {
1306 int ret;
1307 u64 qgroupid = parse_qgroupid(arg);
1308 int pos = 0;
1309
1310 if (qgroupid == 0) {
1311 error("invalid qgroup specification, qgroupid must not 0");
1312 return -EINVAL;
1313 }
1314
1315 if (*inherit)
1316 pos = (*inherit)->num_qgroups;
1317 ret = qgroup_inherit_realloc(inherit, 1, pos);
1318 if (ret)
1319 return ret;
1320
1321 (*inherit)->qgroups[(*inherit)->num_qgroups++] = qgroupid;
1322
1323 return 0;
1324 }
1325
1326 int qgroup_inherit_add_copy(struct btrfs_qgroup_inherit **inherit, char *arg,
1327 int type)
1328 {
1329 int ret;
1330 u64 qgroup_src;
1331 u64 qgroup_dst;
1332 char *p;
1333 int pos = 0;
1334
1335 p = strchr(arg, ':');
1336 if (!p) {
1337 bad:
1338 error("invalid copy specification, missing separator :");
1339 return -EINVAL;
1340 }
1341 *p = 0;
1342 qgroup_src = parse_qgroupid(arg);
1343 qgroup_dst = parse_qgroupid(p + 1);
1344 *p = ':';
1345
1346 if (!qgroup_src || !qgroup_dst)
1347 goto bad;
1348
1349 if (*inherit)
1350 pos = (*inherit)->num_qgroups +
1351 (*inherit)->num_ref_copies * 2 * type;
1352
1353 ret = qgroup_inherit_realloc(inherit, 2, pos);
1354 if (ret)
1355 return ret;
1356
1357 (*inherit)->qgroups[pos++] = qgroup_src;
1358 (*inherit)->qgroups[pos++] = qgroup_dst;
1359
1360 if (!type)
1361 ++(*inherit)->num_ref_copies;
1362 else
1363 ++(*inherit)->num_excl_copies;
1364
1365 return 0;
1366 }
(deprecated) Btrfs progs developments and patch integration